Long-term mental health impact of COVID-19 on primary care health workers in northern Spain: Results from a two-phase longitudinal study Ana Viejo Casas; Marcos Gómez-Revuelta; Urko Merino Garay; Francisco Ruiz Guerrero; Mario Ruiz Núñez; Patricia Fernández Solla; Roberto Garrastazu López; Juan Carlos López Caro; Elsa García Rumayor; Laura Boada Antón; María Juncal Ruiz; Víctor Ortiz-García de la Foz; Javier Vázquez-Bourgon;